Price (USD)
G Pen Roam edgeG Pen Roam
$100
The Coma
$588
G Pen Roam is typically around $488 lower.
Vaporizer Comparison
G Pen Roam vs The Coma
Side-by-side specs, pricing context, and clear decision guidance.
G Pen Roam
Grenco Science from $49.95
VS
The Coma
Vices $588
Editorial Summary
G Pen Roam and The Coma are both electronic vaporizers, but they target different priorities. G Pen Roam is usually the lower-cost pick at $100, around $488 below The Coma. Session style, airflow, and extraction behavior will matter more than raw spec sheet numbers here.
Specs Compared
28
Different Specs
28
Shared Specs
0
Overall Overlap
0%
Shared Traits
Electronic
Head-to-Head Highlights
A quick snapshot of the specs people usually care about first.
Heating Style
Close callG Pen Roam
Conduction
The Coma
Convection (wired ball vaporizer)
Heating style differs, which can impact flavor and extraction behavior.
Key Differences at a Glance
Top specs where these two devices diverge.
Price (USD)
G Pen Roam
$100
The Coma
$588
Device Type
G Pen Roam
Portable
The Coma
Desktop
Heating Type
G Pen Roam
Conduction
The Coma
Convection (wired ball vaporizer)
Temperature Range
G Pen Roam
204°C - 427°C (400°F - 800°F)
The Coma
200-300°C (392-572°F) recommended by Vices
Battery Type
G Pen Roam
Internal
The Coma
None
Battery Capacity
G Pen Roam
1300mAh
The Coma
N/A
Charging
G Pen Roam
Micro-USB
The Coma
N/A
Power Adjustment
G Pen Roam
Digital Control
The Coma
PID controller, switchable between °C and °F
Chamber Material
G Pen Roam
Quartz
The Coma
Titanium Macro Bowl with an Everlasting titanium screen
Brand
G Pen Roam
Grenco Science
The Coma
Vices
Choose G Pen Roam if...
- You want the lower listed entry price ($100 vs $588).
- You prefer a conduction heating profile.
- Your usage leans toward portable and concentrates sessions.
Lowest price
$49.95
at G Pen
Choose The Coma if...
- You prefer a convection (wired ball vaporizer) heating profile.
- Your usage leans toward desktop and ball vape sessions.
- You prefer The Coma's overall feature mix and form factor.
Prices are read automatically from retailer pages and were last checked Aug 27, 2026; confirm the price at checkout. Some links are affiliate links, which support Thermal Extractions at no extra cost to you.
Spec Comparison Table
Direct comparison of every spec from each device profile.
28 differ 0 shared
| Specification | G Pen Roam | The Coma |
|---|---|---|
| Price (USD) | $100 | $588 |
| Device Type | Portable | Desktop |
| Heating Type | Conduction | Convection (wired ball vaporizer) |
| Heat Up Time | ~5 seconds | — |
| Temperature Range | 204°C - 427°C (400°F - 800°F) | 200-300°C (392-572°F) recommended by Vices |
| Chamber Capacity | — | 0.2g to 1.6g |
| Battery Type | Internal | None |
| Battery Capacity | 1300mAh | N/A |
| Battery Life | 15-20 sessions | — |
| Charging | Micro-USB | N/A |
| Charge Time | ~2 hours | — |
| Weight | ~317g | — |
| Power Adjustment | Digital Control | PID controller, switchable between °C and °F |
| Chamber Material | Quartz | Titanium Macro Bowl with an Everlasting titanium screen |
| Concentrate Support | Yes | — |
| Brand | Grenco Science | Vices |
| Adjustable Airflow | No | — |
| Coil Size | — | 35mm enclosed coil, wired directly to the PID |
| Display Type | LED | — |
| Haptic Feedback | Yes | — |
| Heater Material | — | Titanium with an aluminium handle and heat sync hardware |
| Manufacturer | — | Vices, Brisbane Australia |
| Power Options | — | 110V (US and Canada) or 220V (AU, UK and EU) |
| Release Date | 2020 | 2026 |
| Session Style | — | On-Demand |
| Thermal Matrix | — | ~3500 mixed cut ruby corundum gems, 2 to 2.5mm |
| Warranty | 1 year | Australian Consumer Law cover, no fixed term published. Consumables excluded |
| Water Pipe Adapter | — | 14mm glass joint fitted, 18mm spare included |
Comparison FAQs
What is the biggest difference between the G Pen Roam and the The Coma?
The biggest practical difference is price tier: the G Pen Roam sits at $100 while the The Coma is $588, a gap of about $488 that puts them in different buying brackets.
Which is cheaper, the G Pen Roam or the The Coma?
G Pen Roam is the cheaper option at $100 compared with $588 for the The Coma, about $488 less. Live retailer pricing can shift, so confirm before buying.
What's the difference in heating between the G Pen Roam and the The Coma?
G Pen Roam uses conduction heating, while the The Coma uses convection (wired ball vaporizer). Heating style influences flavor profile, vapor density, and how forgiving the device is to draw technique.
Is the G Pen Roam or the The Coma better for home versus on-the-go use?
G Pen Roam is the take-anywhere choice. It's a portable, battery-powered unit, while the The Coma is built for home use, where bigger heaters, AC power, and larger chambers make sense.
Can I set custom temperatures on the G Pen Roam or the The Coma?
G Pen Roam controls heat with digital control, while the The Coma uses pid controller, switchable between °c and °f. G Pen Roam gives you finer per-degree control.
Which has a wider temperature range, the G Pen Roam or the The Coma?
G Pen Roam covers 204°C - 427°C (400°F - 800°F), a wider band than the The Coma at 200-300°C (392-572°F) recommended by Vices. A wider range gives you more room to dial in flavor at the low end and big clouds at the top.
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